I totally agree with the posts about making (at least) codeshares available on co.com. If CO wants to push us to their metal, fine. Just say that a particular flight gets 50% EQM on the site, but don't make us go to Orbitz to make bookings, you just lose the revenue.
Also, how about giving us all possible flight combinations? I KNOW I can connect in CLE and EWR from DCA. Stop forcing me to connect through IAH. I can't tell you how many times I've had to go to Orbitz and piece together a CO itin connecting in CLE simply because CO.com won't give me a connection I know exisits. If I have to pay more, I have to pay more, but at least give me the option.